I got a stock (not for long) '91 civic. it just started to overheat and its runnin' all screwy. It appears to be the thermostat, but at the same time this has happened my heater (a nessecity in NY during this time of year) blows cold. It doesnt make any sense to me that the car would run dangerously hot, yet blow cold air outta the heater. What the hell is wrong?!?!?